INVESTMENTS (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Variable Interest Entity [Line Items]
Minimum ownership percentage for controlling interest (percent)	50.00%
Maximum ownership percentage for equity method investment (percent)	50.00%
Equity method investment, aggregate cost	$ 48,000		$ 46,100
Maximum ownership percentage for cost method investment (percent)	20.00%
Investment in equity method investee	$ 196	$ 0
Investment Owned, at Cost	20,000		20,000
Cash and cash equivalents	149,883		126,450
Patient accounts receivable	356,909		313,373
Other current assets	26,125		30,060
Total current assets	555,902		496,935
Property and equipment	44,654		41,845
Operating lease right of use assets	84,692		88,939
Goodwill	1,244,679		1,244,679
Intangible assets	100,832		102,675
Other assets	86,609		85,097
Total assets	2,117,368		2,060,170
Accounts payable	26,626		28,237
Payroll and employee benefits	136,118		136,835
Accrued expenses	147,038		140,049
Operating lease liabilities	26,447		26,286
Total liabilities	938,482		940,387
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Cash and cash equivalents	9,100		8,800
Patient accounts receivable	7,900		9,000
Other current assets	0		100
Total current assets	17,000		17,900
Property and equipment	0		100
Operating lease right of use assets	100		100
Goodwill	8,500		8,500
Intangible assets	400		400
Other assets	200		300
Total assets	26,200		27,300
Accounts payable	500		500
Payroll and employee benefits	1,000		900
Accrued expenses	8,800		7,900
Total liabilities	$ 10,300		$ 9,300